/*
 * Copyright 2019-2021 the original author or authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cool.houge.ws.session;

import java.util.Collection;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

/**
 * 群组会话管理.
 *
 * @author KK (kzou227@qq.com)
 */
public interface SessionGroupManager {

    /**
     * 会话订阅群组.
     *
     * @param groupIds 群组 IDs
     */
    Mono<Void> subscribe(Session session, Collection<String> groupIds);

    /**
     * 会话取消订阅群组.
     *
     * @param groupIds 群组 IDs
     */
    Mono<Void> unsubscribe(Session session, Collection<String> groupIds);

    /**
     * 查询群组下订阅的所有会话.
     *
     * @param groupId 群组 ID
     * @return 已订阅群组的会话
     */
    Flux<Session> findByGroupId(String groupId);
}
